How can I create one large array across 3 controllers

I have a new HP ProLiant ML350 Gen 8 with 18 2TB drives in it. It has 3 array controllers in it. It is fairly clear how to make an array on each controller thru the ACU interface (F8) during bootup, but what is the next step to the logical drives. I would like 1 arrays, one for the OS and the other for VMs on Hyper-V.
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WORKS2011Austin Tech CompanyCommented:
You will control this through the "Disk Manager"
WORKS2011Austin Tech CompanyCommented:
I'm assuming 2012 R2, Sever Manager / Tools / Computer Management / Disk Management
LarryDAHAuthor Commented:
So just create my arrays on each controller, boot the server then use Disk Manager to make one large logical disk?
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WORKS2011Austin Tech CompanyCommented:
I would create the C: drive during the initial build for the operating system then use Disk Management to create other partitions. It's not always the best idea to shrink the C: drive so make sure to leave plenty of space. As you create additional partitions you can expand, shrink, and delete them.

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Seth SimmonsSr. Systems AdministratorCommented:
doing something like this implies software raid on top of hardware raid which makes no sense; should use one or the other

if you had 6 drives connected to each of the 3 controllers then used storage spaces (or disk management) to create a very large drive that spans across all of them, if one of those controllers fails bringing down a third of the storage, you will have serious issues overall

what controller do you have?  looking around i see it comes with the P420 which supports up to 60 drives (depending on the server chassis) so if that is what you have then why 3 controllers?  don't quite understand the logic here
andyalderSaggar maker's framemakerCommented:
There aren't enough connectors on the controller to connect three backplanes to it Seth, there are optional backplanes that have SAS expanders on them so one controller can handle all three but a bit late now since they have the higher performing 3 controller option.

Software striping or concatenation is really the only option if they need to have all the VMs on a single logical drive although IMHO it's better to just have more than one datastore / drive letter and spread the VMs about over them.
LarryDAHAuthor Commented:
Thanks, it took a few reboots and disk scans to get the changes to show up but I have what I was looking for.
andyalderSaggar maker's framemakerCommented:
Did you use software striping to get it to show up as one big volume under Windows?
LarryDAHAuthor Commented:
That is the way it is at the moment. However, I will probably redo it as RAID 10
andyalderSaggar maker's framemakerCommented:
Software RAID 0 is fine since you can use hardware RAID 10 on each controller for disk redundancy and performance. In effect you'll have RAID 10+0. I'd still rather see 3 separate volumes with VMs spread over them.
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